Tree
How to grow silver birch
Betula pendula
Plant silver birch as a small bare-root whip between November and March, in full sun or light shade and any soil that drains, from sand to heavy loam. Young whips establish faster than large potted trees. The two things that matter are a mulched, grass-free circle for the first three years, because the roots are shallow, and pruning only between August and December, because birch bleeds sap heavily from late winter to early summer.
- Hardiness
- Fully hardy
- Position
- Full sun to light shade
- Soil
- Most soils; free-draining
- Ideal pH
- 5.5 to 7.0
- Water
- Low once established
- Feeding
- Light feeder
Sowing and planting silver birch
WhenPlant bare-root Nov to Mar; prune only Aug to Dec
Starting off
Plant bare-root whips 60 to 90 cm tall Nov to Mar, which establish far better than large pot-grown trees; stake low with a 60 cm stake and a tree tie for 2 years only. Propagate from seed collected in Aug to Sep, sown on the surface of a tray outdoors in Mar and germinating in 3 to 4 weeks in light; cultivars are grafted in Feb under cover. Keep a 1 m circle weed-free and mulched for 3 years, as birch hates grass competition when young.
Spacing and planting
B. pendula reaches 15 to 25 m tall by 8 to 10 m wide in 30 to 40 years; 'Youngii' (weeping) stays at 6 m by 6 m and B. utilis var. jacquemontii 12 to 15 m by 8 m. Plant 10 m from buildings and drains on clay, 8 m from other trees, or three stems in one hole 60 cm apart for a multi-stem effect; dig a square hole twice the rootball width and no deeper. Not a container plant beyond a few years in a 60 cm tub.
Varieties worth growing
- Betula pendula
- The native silver birch: white bark with black diamonds, drooping twigs and yellow autumn leaves. Fast, light-canopied and the best for wildlife.
- B. pendula 'Youngii'
- Young's weeping birch, a mushroom-headed tree to about 6 m with branches sweeping the ground. A lawn specimen for a small garden.
- B. pendula 'Tristis'
- Tall and narrow with a straight white trunk and hanging branchlets. All the grace of the species in half the width.
- B. utilis subsp. jacquemontii 'Doorenbos' (Snow Queen)
- The Himalayan birch for dazzling white bark from a young age, right down to the ground. The usual choice for multi-stem planting.
- B. albosinensis 'Fascination'
- Chinese red birch with peeling bark in orange, pink and cream. Something different where a white trunk would be lost against a pale wall.
Silver birch month by month
Timings are for central England. Allow two weeks later in the north and on cold, heavy soil.
- January
Plant bare-root whips in open weather. Do not prune.
- February
Plant bare-root. Wash green algae off white-barked birches with plain water and a soft brush.
- March
Last month for bare-root planting. Seaweed meal for trees in their first two years. Sow seed on the surface of a tray outdoors.
- April
Mulch a 1 m circle. Leaves and catkins open.
- May
Water first and second-year trees in dry spells. Do not prune.
- June
Water young trees: 30 litres a week when dry. Keep the circle weeded.
- July
Keep watering young trees in drought.
- August
Pruning window opens. Remove dead, crossing or low branches, keeping cuts under 5 cm across. Collect seed.
- September
Prune if needed. Collect seed as the catkins break up.
- October
Yellow autumn colour. Leave some fallen leaves under the tree as mulch.
- November
Bare-root planting begins. Remove the stake after two years. Last sensible month for pruning.
- December
Plant in open weather. Finish any pruning before the year ends.
Feeding silver birch
A pioneer tree that colonises bare, poor ground and needs no fertiliser once established. Birch depends heavily on mycorrhizal fungi, so inoculate at planting, give seaweed meal and a mulch for two springs, and keep grass off the roots. Then stop.
Low, a tough pioneer tree; little feeding needed.
Feeding plan
November to March, at planting
5 g per litre of root ball, touching the roots: 50 g for a tree in a 10 litre pot. The label gives no bare-root figure; treat a 60 to 90 cm whip's roots as about 2 litres and dust on 10 g while they are damp.
March, first and second spring
50 g/m², the bottom of the label range: about 40 g over the cleared 1 m circle (0.8 m²), watered in. Once each spring.
April, first three years
Garden compost
A 5 cm mulch of compost, leaf mould or composted bark over the 1 m circle, kept 10 cm clear of the trunk.
June to August, first summer
1 g per litre of water: 30 g in the 30 litres a young tree gets weekly in dry weather, every 2 to 3 weeks.
From the third year
Nothing
No feed. A thin crown on an older tree in a lawn is usually drought or grass competition; widen the mulched circle rather than fertilising.
Signs to watch
Yellowing leaves and early leaf drop in Aug → drought on a shallow-rooted tree, especially in a lawn, not a deficiency → 30 litres weekly for young trees in dry spells and a 1 m mulched circle. Small pale leaves and thin crown on a young tree in grass → nitrogen hunger from grass competition → clear the turf for 1 m and mulch; a balanced feed in Mar for 2 years. Yellow leaves with green veins on s
Pests, diseases and problems
Sap pouring from a cut for days or weeks
Pruning between January and June, when root pressure is high
Do not seal or bind the wound; it stops when the leaves are fully out. Prune only from August to December in future.
Orange-yellow powdery spots under the leaves in late summer, leaves falling early
Birch rust, a fungus that builds up in damp seasons
No treatment is needed on an established tree. Rake up and compost fallen leaves, and water young trees in drought so they are not weakened twice.
Sticky drip and black mould on cars, paving and plants under the tree
Honeydew from birch aphids feeding on the leaves
Tolerate it; the aphids feed blue tits and ladybirds and do the tree no harm. Do not plant birch over a drive or a seating area.
Dense, twiggy clusters like large birds' nests in the crown
Witches' brooms, caused by a fungus that makes buds grow abnormally
Leave them. They are harmless. Cut out a low one in autumn if you dislike the look.
Dieback of branches, thin crown, and a white fungal sheet under the bark at soil level
Honey fungus, to which birch is very susceptible
There is no cure. Remove the tree with its stump and as much root as possible, and replant with something rarely affected, such as ginkgo, catalpa or box.
Pale hoof-shaped brackets growing from the trunk
Birch polypore, a decay fungus that attacks old or stressed trees
The tree is rotting internally. Have a qualified arborist assess it if it stands near a house, road or path.
Pruning
Pruning and care
Needs little pruning: remove dead, crossing or low branches in Aug to Dec only, since birch bleeds heavily from cuts made Jan to Jun, and keep cuts under 5 cm across. Do not reduce the crown; birch does not regrow well from large cuts and the light canopy rarely needs it. Lift the crown by removing the lowest branches to 2 to 3 m when the trunk is 10 cm thick to show the bark, and wash the white bark with
Good to knowLovely white bark and a light canopy; shallow, greedy roots, so underplant carefully. Don't prune in spring (it bleeds sap).
Growing silver birch in pots
Silver birch is not a container tree for the long term. It is shallow-rooted and thirsty, and a potted birch scorches and drops its leaves in the first dry week of summer. A young tree can be held for a few years in a 60 cm tub of loam-based compost, watered daily from May to September and top-dressed each spring, but it should go into the ground between November and March before the roots circle the pot. If you want white bark on a terrace for longer, the weeping 'Youngii' copes best, though it is still happier planted out.
Silver birch: common questions
When is the best time to prune a silver birch?
Prune between August and December. From January to June birch is under strong sap pressure and cuts bleed for weeks, which weakens the tree. Keep pruning light: remove dead, crossing and low branches with cuts under 5 cm across, and do not reduce the crown.
How close to a house can I plant a silver birch?
Keep a native silver birch about 10 m from buildings and drains on shrinkable clay; on sand, gravel or loam the risk is much lower. Birch has a moderate water demand compared with willow, poplar or oak, but it grows to 15 to 25 m, so space and shade matter as much as roots. For a small garden choose 'Youngii' at about 6 m.
How long do silver birch trees live?
Silver birch is short-lived for a tree, typically 60 to 90 years. It grows fast when young and starts to decline once bracket fungi get into the trunk. That speed is why it suits a new garden that needs height quickly.
Sources
Growing information on this page was checked against these references in November 2026. Feeding rates are Dr Forest label rates.
- How to grow birchRHS
- Honey fungusRHS
- Silver birch (Betula pendula)Woodland Trust